"Microsoft Azure Backup encountered an internal error" when creating backup-vault via python sdk

I'm trying to create backup vaults from yaml configuration with python azure sdk. This is the documentation of the function

I'm using the azure-mgmt-dataprotection package to run the following code:

vault_properties = data_clt.backup_vaults.models.BackupVault(storage_settings=([None, None]))
vault_create = data_clt.backup_vaults.begin_create_or_update(backup.name, resource_group,                                                                              
                                                             parameters=BackupVaultResource(
                                                                 e_tag=None,
                                                                 identity=None,
                                                                 location=location,
                                                                 tags={},                                                                                   
                                                                 properties=vault_properties
                                                              ))
vault_create_result = vault_create.result()

backup.name and resource_group are read out of a yaml file and are correct. resource_group exists and backup.name is not used yet. Running the code, I get this error:

azure.core.exceptions.HttpResponseError: (CloudInternalError) Microsoft Azure Backup encountered an internal error.
Code: CloudInternalError
Message: Microsoft Azure Backup encountered an internal error.
Additional Information:Type: UserFacingError
Info: {
    "message": "Microsoft Azure Backup encountered an internal error.",
    "recommendedAction": [
        "Wait for a few minutes and then try the operation again. If the issue persists, please contact Microsoft support."
    ],
    "details": null,
    "code": "CloudInternalError",
    "target": "",
    "innerError": null,
    "isRetryable": false,
    "isUserError": false,
    "properties": {
        "ActivityId": "*****"
    }
}

Do you have any idea how this could be fixed?